I've checked speed engineerings website and saw they had a pro series and a performance series cracked rod bolt from arp, there's about a 20 dollar difference between the two. Which ones would i be better of going with? Thanks fellas

 

I used the ARP 2000s, but most say the plain ole arp rod bolts work fine, I think mine are the wave-locks

 

I got a set of 234-6301's ARP 2000's for my LQ build.